2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Intel Corporation. All rights reserved.
4 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
5 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 #include <linux/module.h>
37 #include <linux/errno.h>
38 #include <linux/slab.h>
39 #include <linux/workqueue.h>
40 #include <linux/netdevice.h>
41 #include <net/addrconf.h>
43 #include <rdma/ib_cache.h>
45 #include "core_priv.h"
47 struct ib_pkey_cache {
52 struct ib_update_work {
53 struct work_struct work;
54 struct ib_device *device;
56 bool enforce_security;
62 enum gid_attr_find_mask {
63 GID_ATTR_FIND_MASK_GID = 1UL << 0,
64 GID_ATTR_FIND_MASK_NETDEV = 1UL << 1,
65 GID_ATTR_FIND_MASK_DEFAULT = 1UL << 2,
66 GID_ATTR_FIND_MASK_GID_TYPE = 1UL << 3,
69 enum gid_table_entry_props {
70 GID_TABLE_ENTRY_INVALID = 1UL << 0,
71 GID_TABLE_ENTRY_DEFAULT = 1UL << 1,
74 struct ib_gid_table_entry {
77 struct ib_gid_attr attr;
83 /* In RoCE, adding a GID to the table requires:
84 * (a) Find if this GID is already exists.
85 * (b) Find a free space.
86 * (c) Write the new GID
88 * Delete requires different set of operations:
93 /* Any writer to data_vec must hold this lock and the write side of
94 * rwlock. readers must hold only rwlock. All writers must be in a
98 /* rwlock protects data_vec[ix]->props. */
100 struct ib_gid_table_entry *data_vec;
103 static void dispatch_gid_change_event(struct ib_device *ib_dev, u8 port)
105 struct ib_event event;
107 event.device = ib_dev;
108 event.element.port_num = port;
109 event.event = IB_EVENT_GID_CHANGE;
111 ib_dispatch_event(&event);
114 static const char * const gid_type_str[] = {
115 [IB_GID_TYPE_IB] = "IB/RoCE v1",
116 [IB_GID_TYPE_ROCE_UDP_ENCAP] = "RoCE v2",
119 const char *ib_cache_gid_type_str(enum ib_gid_type gid_type)
121 if (gid_type < ARRAY_SIZE(gid_type_str) && gid_type_str[gid_type])
122 return gid_type_str[gid_type];
124 return "Invalid GID type";
126 EXPORT_SYMBOL(ib_cache_gid_type_str);
128 int ib_cache_gid_parse_type_str(const char *buf)
138 if (buf[len - 1] == '\n')
141 for (i = 0; i < ARRAY_SIZE(gid_type_str); ++i)
142 if (gid_type_str[i] && !strncmp(buf, gid_type_str[i], len) &&
143 len == strlen(gid_type_str[i])) {
150 EXPORT_SYMBOL(ib_cache_gid_parse_type_str);
152 static void del_roce_gid(struct ib_device *device, u8 port_num,
153 struct ib_gid_table *table, int ix)
155 pr_debug("%s device=%s port=%d index=%d gid %pI6\n", __func__,
156 device->name, port_num, ix,
157 table->data_vec[ix].gid.raw);
159 if (rdma_cap_roce_gid_table(device, port_num))
160 device->del_gid(&table->data_vec[ix].attr,
161 &table->data_vec[ix].context);
162 dev_put(table->data_vec[ix].attr.ndev);
165 static int add_roce_gid(struct ib_gid_table *table,
166 const union ib_gid *gid,
167 const struct ib_gid_attr *attr)
169 struct ib_gid_table_entry *entry;
170 int ix = attr->index;
174 pr_err("%s NULL netdev device=%s port=%d index=%d\n",
175 __func__, attr->device->name, attr->port_num,
180 entry = &table->data_vec[ix];
181 if ((entry->props & GID_TABLE_ENTRY_INVALID) == 0) {
182 WARN(1, "GID table corruption device=%s port=%d index=%d\n",
183 attr->device->name, attr->port_num,
188 if (rdma_cap_roce_gid_table(attr->device, attr->port_num)) {
189 ret = attr->device->add_gid(gid, attr, &entry->context);
191 pr_err("%s GID add failed device=%s port=%d index=%d\n",
192 __func__, attr->device->name, attr->port_num,
197 dev_hold(attr->ndev);
201 pr_debug("%s device=%s port=%d index=%d gid %pI6\n", __func__,
202 attr->device->name, attr->port_num, ix, gid->raw);
207 * add_modify_gid - Add or modify GID table entry
209 * @table: GID table in which GID to be added or modified
211 * @attr: Attributes of the GID
213 * Returns 0 on success or appropriate error code. It accepts zero
214 * GID addition for non RoCE ports for HCA's who report them as valid
215 * GID. However such zero GIDs are not added to the cache.
217 static int add_modify_gid(struct ib_gid_table *table,
218 const union ib_gid *gid,
219 const struct ib_gid_attr *attr)
223 if (rdma_protocol_roce(attr->device, attr->port_num)) {
224 ret = add_roce_gid(table, gid, attr);
229 * Some HCA's report multiple GID entries with only one
230 * valid GID, but remaining as zero GID.
231 * So ignore such behavior for IB link layer and don't
232 * fail the call, but don't add such entry to GID cache.
234 if (!memcmp(gid, &zgid, sizeof(*gid)))
238 lockdep_assert_held(&table->lock);
239 memcpy(&table->data_vec[attr->index].gid, gid, sizeof(*gid));
240 memcpy(&table->data_vec[attr->index].attr, attr, sizeof(*attr));
242 write_lock_irq(&table->rwlock);
243 table->data_vec[attr->index].props &= ~GID_TABLE_ENTRY_INVALID;
244 write_unlock_irq(&table->rwlock);
249 * del_gid - Delete GID table entry
251 * @ib_dev: IB device whose GID entry to be deleted
252 * @port: Port number of the IB device
253 * @table: GID table of the IB device for a port
254 * @ix: GID entry index to delete
257 static void del_gid(struct ib_device *ib_dev, u8 port,
258 struct ib_gid_table *table, int ix)
260 lockdep_assert_held(&table->lock);
261 write_lock_irq(&table->rwlock);
262 table->data_vec[ix].props |= GID_TABLE_ENTRY_INVALID;
263 write_unlock_irq(&table->rwlock);
265 if (rdma_protocol_roce(ib_dev, port))
266 del_roce_gid(ib_dev, port, table, ix);
267 memcpy(&table->data_vec[ix].gid, &zgid, sizeof(zgid));
268 memset(&table->data_vec[ix].attr, 0, sizeof(table->data_vec[ix].attr));
269 table->data_vec[ix].context = NULL;
272 /* rwlock should be read locked, or lock should be held */
273 static int find_gid(struct ib_gid_table *table, const union ib_gid *gid,
274 const struct ib_gid_attr *val, bool default_gid,
275 unsigned long mask, int *pempty)
279 int empty = pempty ? -1 : 0;
281 while (i < table->sz && (found < 0 || empty < 0)) {
282 struct ib_gid_table_entry *data = &table->data_vec[i];
283 struct ib_gid_attr *attr = &data->attr;
288 /* find_gid() is used during GID addition where it is expected
289 * to return a free entry slot which is not duplicate.
290 * Free entry slot is requested and returned if pempty is set,
291 * so lookup free slot only if requested.
293 if (pempty && empty < 0) {
294 if (data->props & GID_TABLE_ENTRY_INVALID &&
296 !!(data->props & GID_TABLE_ENTRY_DEFAULT))) {
298 * Found an invalid (free) entry; allocate it.
299 * If default GID is requested, then our
300 * found slot must be one of the DEFAULT
301 * reserved slots or we fail.
302 * This ensures that only DEFAULT reserved
303 * slots are used for default property GIDs.
310 * Additionally find_gid() is used to find valid entry during
311 * lookup operation, where validity needs to be checked. So
312 * find the empty entry first to continue to search for a free
313 * slot and ignore its INVALID flag.
315 if (data->props & GID_TABLE_ENTRY_INVALID)
321 if (mask & GID_ATTR_FIND_MASK_GID_TYPE &&
322 attr->gid_type != val->gid_type)
325 if (mask & GID_ATTR_FIND_MASK_GID &&
326 memcmp(gid, &data->gid, sizeof(*gid)))
329 if (mask & GID_ATTR_FIND_MASK_NETDEV &&
330 attr->ndev != val->ndev)
333 if (mask & GID_ATTR_FIND_MASK_DEFAULT &&
334 !!(data->props & GID_TABLE_ENTRY_DEFAULT) !=
347 static void make_default_gid(struct net_device *dev, union ib_gid *gid)
349 gid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
350 addrconf_ifid_eui48(&gid->raw[8], dev);
353 static int __ib_cache_gid_add(struct ib_device *ib_dev, u8 port,
354 union ib_gid *gid, struct ib_gid_attr *attr,
355 unsigned long mask, bool default_gid)
357 struct ib_gid_table *table;
362 /* Do not allow adding zero GID in support of
363 * IB spec version 1.3 section 4.1.1 point (6) and
364 * section 12.7.10 and section 12.7.20
366 if (!memcmp(gid, &zgid, sizeof(*gid)))
369 table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid;
371 mutex_lock(&table->lock);
373 ix = find_gid(table, gid, attr, default_gid, mask, &empty);
381 attr->device = ib_dev;
383 attr->port_num = port;
384 ret = add_modify_gid(table, gid, attr);
386 dispatch_gid_change_event(ib_dev, port);
389 mutex_unlock(&table->lock);
391 pr_warn("%s: unable to add gid %pI6 error=%d\n",
392 __func__, gid->raw, ret);
396 int ib_cache_gid_add(struct ib_device *ib_dev, u8 port,
397 union ib_gid *gid, struct ib_gid_attr *attr)
399 struct net_device *idev;
403 if (ib_dev->get_netdev) {
404 idev = ib_dev->get_netdev(ib_dev, port);
405 if (idev && attr->ndev != idev) {
406 union ib_gid default_gid;
408 /* Adding default GIDs in not permitted */
409 make_default_gid(idev, &default_gid);
410 if (!memcmp(gid, &default_gid, sizeof(*gid))) {
419 mask = GID_ATTR_FIND_MASK_GID |
420 GID_ATTR_FIND_MASK_GID_TYPE |
421 GID_ATTR_FIND_MASK_NETDEV;
423 ret = __ib_cache_gid_add(ib_dev, port, gid, attr, mask, false);
428 _ib_cache_gid_del(struct ib_device *ib_dev, u8 port,
429 union ib_gid *gid, struct ib_gid_attr *attr,
430 unsigned long mask, bool default_gid)
432 struct ib_gid_table *table;
436 table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid;
438 mutex_lock(&table->lock);
440 ix = find_gid(table, gid, attr, default_gid, mask, NULL);
446 del_gid(ib_dev, port, table, ix);
447 dispatch_gid_change_event(ib_dev, port);
450 mutex_unlock(&table->lock);
452 pr_debug("%s: can't delete gid %pI6 error=%d\n",
453 __func__, gid->raw, ret);
457 int ib_cache_gid_del(struct ib_device *ib_dev, u8 port,
458 union ib_gid *gid, struct ib_gid_attr *attr)
460 unsigned long mask = GID_ATTR_FIND_MASK_GID |
461 GID_ATTR_FIND_MASK_GID_TYPE |
462 GID_ATTR_FIND_MASK_DEFAULT |
463 GID_ATTR_FIND_MASK_NETDEV;
465 return _ib_cache_gid_del(ib_dev, port, gid, attr, mask, false);
468 int ib_cache_gid_del_all_netdev_gids(struct ib_device *ib_dev, u8 port,
469 struct net_device *ndev)
471 struct ib_gid_table *table;
473 bool deleted = false;
475 table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid;
477 mutex_lock(&table->lock);
479 for (ix = 0; ix < table->sz; ix++) {
480 if (table->data_vec[ix].attr.ndev == ndev) {
481 del_gid(ib_dev, port, table, ix);
486 mutex_unlock(&table->lock);
489 dispatch_gid_change_event(ib_dev, port);
494 static int __ib_cache_gid_get(struct ib_device *ib_dev, u8 port, int index,
495 union ib_gid *gid, struct ib_gid_attr *attr)
497 struct ib_gid_table *table;
499 table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid;
501 if (index < 0 || index >= table->sz)
504 if (table->data_vec[index].props & GID_TABLE_ENTRY_INVALID)
507 memcpy(gid, &table->data_vec[index].gid, sizeof(*gid));
509 memcpy(attr, &table->data_vec[index].attr, sizeof(*attr));
511 dev_hold(attr->ndev);
517 static int _ib_cache_gid_table_find(struct ib_device *ib_dev,
518 const union ib_gid *gid,
519 const struct ib_gid_attr *val,
521 u8 *port, u16 *index)
523 struct ib_gid_table *table;
528 for (p = 0; p < ib_dev->phys_port_cnt; p++) {
529 table = ib_dev->cache.ports[p].gid;
530 read_lock_irqsave(&table->rwlock, flags);
531 local_index = find_gid(table, gid, val, false, mask, NULL);
532 if (local_index >= 0) {
534 *index = local_index;
536 *port = p + rdma_start_port(ib_dev);
537 read_unlock_irqrestore(&table->rwlock, flags);
540 read_unlock_irqrestore(&table->rwlock, flags);
546 static int ib_cache_gid_find(struct ib_device *ib_dev,
547 const union ib_gid *gid,
548 enum ib_gid_type gid_type,
549 struct net_device *ndev, u8 *port,
552 unsigned long mask = GID_ATTR_FIND_MASK_GID |
553 GID_ATTR_FIND_MASK_GID_TYPE;
554 struct ib_gid_attr gid_attr_val = {.ndev = ndev, .gid_type = gid_type};
557 mask |= GID_ATTR_FIND_MASK_NETDEV;
559 return _ib_cache_gid_table_find(ib_dev, gid, &gid_attr_val,
564 * ib_find_cached_gid_by_port - Returns the GID table index where a specified
565 * GID value occurs. It searches for the specified GID value in the local
567 * @device: The device to query.
568 * @gid: The GID value to search for.
569 * @gid_type: The GID type to search for.
570 * @port_num: The port number of the device where the GID value should be
572 * @ndev: In RoCE, the net device of the device. Null means ignore.
573 * @index: The index into the cached GID table where the GID was found. This
574 * parameter may be NULL.
576 int ib_find_cached_gid_by_port(struct ib_device *ib_dev,
577 const union ib_gid *gid,
578 enum ib_gid_type gid_type,
579 u8 port, struct net_device *ndev,
583 struct ib_gid_table *table;
584 unsigned long mask = GID_ATTR_FIND_MASK_GID |
585 GID_ATTR_FIND_MASK_GID_TYPE;
586 struct ib_gid_attr val = {.ndev = ndev, .gid_type = gid_type};
589 if (!rdma_is_port_valid(ib_dev, port))
592 table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid;
595 mask |= GID_ATTR_FIND_MASK_NETDEV;
597 read_lock_irqsave(&table->rwlock, flags);
598 local_index = find_gid(table, gid, &val, false, mask, NULL);
599 if (local_index >= 0) {
601 *index = local_index;
602 read_unlock_irqrestore(&table->rwlock, flags);
606 read_unlock_irqrestore(&table->rwlock, flags);
609 EXPORT_SYMBOL(ib_find_cached_gid_by_port);
612 * ib_cache_gid_find_by_filter - Returns the GID table index where a specified
614 * @device: The device to query.
615 * @gid: The GID value to search for.
616 * @port_num: The port number of the device where the GID value could be
618 * @filter: The filter function is executed on any matching GID in the table.
619 * If the filter function returns true, the corresponding index is returned,
620 * otherwise, we continue searching the GID table. It's guaranteed that
621 * while filter is executed, ndev field is valid and the structure won't
622 * change. filter is executed in an atomic context. filter must not be NULL.
623 * @index: The index into the cached GID table where the GID was found. This
624 * parameter may be NULL.
626 * ib_cache_gid_find_by_filter() searches for the specified GID value
627 * of which the filter function returns true in the port's GID table.
628 * This function is only supported on RoCE ports.
631 static int ib_cache_gid_find_by_filter(struct ib_device *ib_dev,
632 const union ib_gid *gid,
634 bool (*filter)(const union ib_gid *,
635 const struct ib_gid_attr *,
640 struct ib_gid_table *table;
646 if (!rdma_is_port_valid(ib_dev, port) ||
647 !rdma_protocol_roce(ib_dev, port))
648 return -EPROTONOSUPPORT;
650 table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid;
652 read_lock_irqsave(&table->rwlock, flags);
653 for (i = 0; i < table->sz; i++) {
654 struct ib_gid_attr attr;
656 if (table->data_vec[i].props & GID_TABLE_ENTRY_INVALID)
659 if (memcmp(gid, &table->data_vec[i].gid, sizeof(*gid)))
662 memcpy(&attr, &table->data_vec[i].attr, sizeof(attr));
664 if (filter(gid, &attr, context)) {
671 read_unlock_irqrestore(&table->rwlock, flags);
678 static struct ib_gid_table *alloc_gid_table(int sz)
680 struct ib_gid_table *table =
681 kzalloc(sizeof(struct ib_gid_table), GFP_KERNEL);
687 table->data_vec = kcalloc(sz, sizeof(*table->data_vec), GFP_KERNEL);
688 if (!table->data_vec)
691 mutex_init(&table->lock);
694 rwlock_init(&table->rwlock);
696 /* Mark all entries as invalid so that allocator can allocate
697 * one of the invalid (free) entry.
699 for (i = 0; i < sz; i++)
700 table->data_vec[i].props |= GID_TABLE_ENTRY_INVALID;
708 static void release_gid_table(struct ib_gid_table *table)
711 kfree(table->data_vec);
716 static void cleanup_gid_table_port(struct ib_device *ib_dev, u8 port,
717 struct ib_gid_table *table)
720 bool deleted = false;
725 mutex_lock(&table->lock);
726 for (i = 0; i < table->sz; ++i) {
727 if (memcmp(&table->data_vec[i].gid, &zgid,
728 sizeof(table->data_vec[i].gid))) {
729 del_gid(ib_dev, port, table, i);
733 mutex_unlock(&table->lock);
736 dispatch_gid_change_event(ib_dev, port);
739 void ib_cache_gid_set_default_gid(struct ib_device *ib_dev, u8 port,
740 struct net_device *ndev,
741 unsigned long gid_type_mask,
742 enum ib_cache_gid_default_mode mode)
744 union ib_gid gid = { };
745 struct ib_gid_attr gid_attr;
746 struct ib_gid_table *table;
747 unsigned int gid_type;
750 table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid;
752 mask = GID_ATTR_FIND_MASK_GID_TYPE |
753 GID_ATTR_FIND_MASK_DEFAULT |
754 GID_ATTR_FIND_MASK_NETDEV;
755 memset(&gid_attr, 0, sizeof(gid_attr));
756 gid_attr.ndev = ndev;
758 for (gid_type = 0; gid_type < IB_GID_TYPE_SIZE; ++gid_type) {
759 if (1UL << gid_type & ~gid_type_mask)
762 gid_attr.gid_type = gid_type;
764 if (mode == IB_CACHE_GID_DEFAULT_MODE_SET) {
765 make_default_gid(ndev, &gid);
766 __ib_cache_gid_add(ib_dev, port, &gid,
767 &gid_attr, mask, true);
768 } else if (mode == IB_CACHE_GID_DEFAULT_MODE_DELETE) {
769 _ib_cache_gid_del(ib_dev, port, &gid,
770 &gid_attr, mask, true);
775 static int gid_table_reserve_default(struct ib_device *ib_dev, u8 port,
776 struct ib_gid_table *table)
779 unsigned long roce_gid_type_mask;
780 unsigned int num_default_gids;
781 unsigned int current_gid = 0;
783 roce_gid_type_mask = roce_gid_type_mask_support(ib_dev, port);
784 num_default_gids = hweight_long(roce_gid_type_mask);
785 for (i = 0; i < num_default_gids && i < table->sz; i++) {
786 struct ib_gid_table_entry *entry =
789 entry->props |= GID_TABLE_ENTRY_DEFAULT;
790 current_gid = find_next_bit(&roce_gid_type_mask,
793 entry->attr.gid_type = current_gid++;
799 static int _gid_table_setup_one(struct ib_device *ib_dev)
802 struct ib_gid_table *table;
805 for (port = 0; port < ib_dev->phys_port_cnt; port++) {
806 u8 rdma_port = port + rdma_start_port(ib_dev);
810 ib_dev->port_immutable[rdma_port].gid_tbl_len);
813 goto rollback_table_setup;
816 err = gid_table_reserve_default(ib_dev,
817 port + rdma_start_port(ib_dev),
820 goto rollback_table_setup;
821 ib_dev->cache.ports[port].gid = table;
826 rollback_table_setup:
827 for (port = 0; port < ib_dev->phys_port_cnt; port++) {
828 table = ib_dev->cache.ports[port].gid;
830 cleanup_gid_table_port(ib_dev, port + rdma_start_port(ib_dev),
832 release_gid_table(table);
838 static void gid_table_release_one(struct ib_device *ib_dev)
840 struct ib_gid_table *table;
843 for (port = 0; port < ib_dev->phys_port_cnt; port++) {
844 table = ib_dev->cache.ports[port].gid;
845 release_gid_table(table);
846 ib_dev->cache.ports[port].gid = NULL;
850 static void gid_table_cleanup_one(struct ib_device *ib_dev)
852 struct ib_gid_table *table;
855 for (port = 0; port < ib_dev->phys_port_cnt; port++) {
856 table = ib_dev->cache.ports[port].gid;
857 cleanup_gid_table_port(ib_dev, port + rdma_start_port(ib_dev),
862 static int gid_table_setup_one(struct ib_device *ib_dev)
866 err = _gid_table_setup_one(ib_dev);
871 rdma_roce_rescan_device(ib_dev);
876 int ib_get_cached_gid(struct ib_device *device,
880 struct ib_gid_attr *gid_attr)
884 struct ib_gid_table *table;
886 if (!rdma_is_port_valid(device, port_num))
889 table = device->cache.ports[port_num - rdma_start_port(device)].gid;
890 read_lock_irqsave(&table->rwlock, flags);
891 res = __ib_cache_gid_get(device, port_num, index, gid, gid_attr);
892 read_unlock_irqrestore(&table->rwlock, flags);
896 EXPORT_SYMBOL(ib_get_cached_gid);
899 * ib_find_cached_gid - Returns the port number and GID table index where
900 * a specified GID value occurs.
901 * @device: The device to query.
902 * @gid: The GID value to search for.
903 * @gid_type: The GID type to search for.
904 * @ndev: In RoCE, the net device of the device. NULL means ignore.
905 * @port_num: The port number of the device where the GID value was found.
906 * @index: The index into the cached GID table where the GID was found. This
907 * parameter may be NULL.
909 * ib_find_cached_gid() searches for the specified GID value in
910 * the local software cache.
912 int ib_find_cached_gid(struct ib_device *device,
913 const union ib_gid *gid,
914 enum ib_gid_type gid_type,
915 struct net_device *ndev,
919 return ib_cache_gid_find(device, gid, gid_type, ndev, port_num, index);
921 EXPORT_SYMBOL(ib_find_cached_gid);
923 int ib_find_gid_by_filter(struct ib_device *device,
924 const union ib_gid *gid,
926 bool (*filter)(const union ib_gid *gid,
927 const struct ib_gid_attr *,
929 void *context, u16 *index)
931 /* Only RoCE GID table supports filter function */
932 if (!rdma_protocol_roce(device, port_num) && filter)
933 return -EPROTONOSUPPORT;
935 return ib_cache_gid_find_by_filter(device, gid,
940 int ib_get_cached_pkey(struct ib_device *device,
945 struct ib_pkey_cache *cache;
949 if (!rdma_is_port_valid(device, port_num))
952 read_lock_irqsave(&device->cache.lock, flags);
954 cache = device->cache.ports[port_num - rdma_start_port(device)].pkey;
956 if (index < 0 || index >= cache->table_len)
959 *pkey = cache->table[index];
961 read_unlock_irqrestore(&device->cache.lock, flags);
965 EXPORT_SYMBOL(ib_get_cached_pkey);
967 int ib_get_cached_subnet_prefix(struct ib_device *device,
974 if (!rdma_is_port_valid(device, port_num))
977 p = port_num - rdma_start_port(device);
978 read_lock_irqsave(&device->cache.lock, flags);
979 *sn_pfx = device->cache.ports[p].subnet_prefix;
980 read_unlock_irqrestore(&device->cache.lock, flags);
984 EXPORT_SYMBOL(ib_get_cached_subnet_prefix);
986 int ib_find_cached_pkey(struct ib_device *device,
991 struct ib_pkey_cache *cache;
997 if (!rdma_is_port_valid(device, port_num))
1000 read_lock_irqsave(&device->cache.lock, flags);
1002 cache = device->cache.ports[port_num - rdma_start_port(device)].pkey;
1006 for (i = 0; i < cache->table_len; ++i)
1007 if ((cache->table[i] & 0x7fff) == (pkey & 0x7fff)) {
1008 if (cache->table[i] & 0x8000) {
1016 if (ret && partial_ix >= 0) {
1017 *index = partial_ix;
1021 read_unlock_irqrestore(&device->cache.lock, flags);
1025 EXPORT_SYMBOL(ib_find_cached_pkey);
1027 int ib_find_exact_cached_pkey(struct ib_device *device,
1032 struct ib_pkey_cache *cache;
1033 unsigned long flags;
1037 if (!rdma_is_port_valid(device, port_num))
1040 read_lock_irqsave(&device->cache.lock, flags);
1042 cache = device->cache.ports[port_num - rdma_start_port(device)].pkey;
1046 for (i = 0; i < cache->table_len; ++i)
1047 if (cache->table[i] == pkey) {
1053 read_unlock_irqrestore(&device->cache.lock, flags);
1057 EXPORT_SYMBOL(ib_find_exact_cached_pkey);
1059 int ib_get_cached_lmc(struct ib_device *device,
1063 unsigned long flags;
1066 if (!rdma_is_port_valid(device, port_num))
1069 read_lock_irqsave(&device->cache.lock, flags);
1070 *lmc = device->cache.ports[port_num - rdma_start_port(device)].lmc;
1071 read_unlock_irqrestore(&device->cache.lock, flags);
1075 EXPORT_SYMBOL(ib_get_cached_lmc);
1077 int ib_get_cached_port_state(struct ib_device *device,
1079 enum ib_port_state *port_state)
1081 unsigned long flags;
1084 if (!rdma_is_port_valid(device, port_num))
1087 read_lock_irqsave(&device->cache.lock, flags);
1088 *port_state = device->cache.ports[port_num
1089 - rdma_start_port(device)].port_state;
1090 read_unlock_irqrestore(&device->cache.lock, flags);
1094 EXPORT_SYMBOL(ib_get_cached_port_state);
1096 static int config_non_roce_gid_cache(struct ib_device *device,
1097 u8 port, int gid_tbl_len)
1099 struct ib_gid_attr gid_attr = {};
1100 struct ib_gid_table *table;
1105 gid_attr.device = device;
1106 gid_attr.port_num = port;
1107 table = device->cache.ports[port - rdma_start_port(device)].gid;
1109 mutex_lock(&table->lock);
1110 for (i = 0; i < gid_tbl_len; ++i) {
1111 if (!device->query_gid)
1113 ret = device->query_gid(device, port, i, &gid);
1115 pr_warn("query_gid failed (%d) for %s (index %d)\n",
1116 ret, device->name, i);
1120 add_modify_gid(table, &gid, &gid_attr);
1123 mutex_unlock(&table->lock);
1127 static void ib_cache_update(struct ib_device *device,
1129 bool enforce_security)
1131 struct ib_port_attr *tprops = NULL;
1132 struct ib_pkey_cache *pkey_cache = NULL, *old_pkey_cache;
1135 struct ib_gid_table *table;
1137 if (!rdma_is_port_valid(device, port))
1140 table = device->cache.ports[port - rdma_start_port(device)].gid;
1142 tprops = kmalloc(sizeof *tprops, GFP_KERNEL);
1146 ret = ib_query_port(device, port, tprops);
1148 pr_warn("ib_query_port failed (%d) for %s\n",
1153 if (!rdma_protocol_roce(device, port)) {
1154 ret = config_non_roce_gid_cache(device, port,
1155 tprops->gid_tbl_len);
1160 pkey_cache = kmalloc(struct_size(pkey_cache, table,
1161 tprops->pkey_tbl_len),
1166 pkey_cache->table_len = tprops->pkey_tbl_len;
1168 for (i = 0; i < pkey_cache->table_len; ++i) {
1169 ret = ib_query_pkey(device, port, i, pkey_cache->table + i);
1171 pr_warn("ib_query_pkey failed (%d) for %s (index %d)\n",
1172 ret, device->name, i);
1177 write_lock_irq(&device->cache.lock);
1179 old_pkey_cache = device->cache.ports[port -
1180 rdma_start_port(device)].pkey;
1182 device->cache.ports[port - rdma_start_port(device)].pkey = pkey_cache;
1183 device->cache.ports[port - rdma_start_port(device)].lmc = tprops->lmc;
1184 device->cache.ports[port - rdma_start_port(device)].port_state =
1187 device->cache.ports[port - rdma_start_port(device)].subnet_prefix =
1188 tprops->subnet_prefix;
1189 write_unlock_irq(&device->cache.lock);
1191 if (enforce_security)
1192 ib_security_cache_change(device,
1194 tprops->subnet_prefix);
1196 kfree(old_pkey_cache);
1205 static void ib_cache_task(struct work_struct *_work)
1207 struct ib_update_work *work =
1208 container_of(_work, struct ib_update_work, work);
1210 ib_cache_update(work->device,
1212 work->enforce_security);
1216 static void ib_cache_event(struct ib_event_handler *handler,
1217 struct ib_event *event)
1219 struct ib_update_work *work;
1221 if (event->event == IB_EVENT_PORT_ERR ||
1222 event->event == IB_EVENT_PORT_ACTIVE ||
1223 event->event == IB_EVENT_LID_CHANGE ||
1224 event->event == IB_EVENT_PKEY_CHANGE ||
1225 event->event == IB_EVENT_SM_CHANGE ||
1226 event->event == IB_EVENT_CLIENT_REREGISTER ||
1227 event->event == IB_EVENT_GID_CHANGE) {
1228 work = kmalloc(sizeof *work, GFP_ATOMIC);
1230 INIT_WORK(&work->work, ib_cache_task);
1231 work->device = event->device;
1232 work->port_num = event->element.port_num;
1233 if (event->event == IB_EVENT_PKEY_CHANGE ||
1234 event->event == IB_EVENT_GID_CHANGE)
1235 work->enforce_security = true;
1237 work->enforce_security = false;
1239 queue_work(ib_wq, &work->work);
1244 int ib_cache_setup_one(struct ib_device *device)
1249 rwlock_init(&device->cache.lock);
1251 device->cache.ports =
1252 kzalloc(sizeof(*device->cache.ports) *
1253 (rdma_end_port(device) - rdma_start_port(device) + 1), GFP_KERNEL);
1254 if (!device->cache.ports)
1257 err = gid_table_setup_one(device);
1259 kfree(device->cache.ports);
1260 device->cache.ports = NULL;
1264 for (p = 0; p <= rdma_end_port(device) - rdma_start_port(device); ++p)
1265 ib_cache_update(device, p + rdma_start_port(device), true);
1267 INIT_IB_EVENT_HANDLER(&device->cache.event_handler,
1268 device, ib_cache_event);
1269 ib_register_event_handler(&device->cache.event_handler);
1273 void ib_cache_release_one(struct ib_device *device)
1278 * The release function frees all the cache elements.
1279 * This function should be called as part of freeing
1280 * all the device's resources when the cache could no
1281 * longer be accessed.
1283 for (p = 0; p <= rdma_end_port(device) - rdma_start_port(device); ++p)
1284 kfree(device->cache.ports[p].pkey);
1286 gid_table_release_one(device);
1287 kfree(device->cache.ports);
1290 void ib_cache_cleanup_one(struct ib_device *device)
1292 /* The cleanup function unregisters the event handler,
1293 * waits for all in-progress workqueue elements and cleans
1294 * up the GID cache. This function should be called after
1295 * the device was removed from the devices list and all
1296 * clients were removed, so the cache exists but is
1297 * non-functional and shouldn't be updated anymore.
1299 ib_unregister_event_handler(&device->cache.event_handler);
1300 flush_workqueue(ib_wq);
1301 gid_table_cleanup_one(device);
1304 void __init ib_cache_setup(void)
1306 roce_gid_mgmt_init();
1309 void __exit ib_cache_cleanup(void)
1311 roce_gid_mgmt_cleanup();